Table 1.
Weekly Diarrhea Incidence and Rainfall in 19 Villages in Rural Coastal Ecuador, February 18, 2004–April 18, 2007
| Villagea | Duration of Surveillance, weeks | Population Meanb (SD) | Diarrhea Incidencec | No. of Heavy Rainfall Eventsd | Annual Rainfall, mme | Remotenessf |
|---|---|---|---|---|---|---|
| 1 | 161 | 42 (5) | 3.57 | 10 | 2,759 | 0.20 |
| 2 | 161 | 105 (19) | 4.95 | 10 | 2,861 | 0.20 |
| 3 | 152 | 195 (37) | 7.55 | 12 | 3,122 | 0.06 |
| 4 | 154 | 297 (116) | 4.20 | 20 | 3,524 | 0.13 |
| 5 | 162 | 511 (124) | 2.81 | 15 | 3,222 | 0.07 |
| 7 | 155 | 69 (9) | 3.84 | 20 | 3,564 | 0.25 |
| 8 | 140 | 116 (34) | 6.45 | 20 | 3,548 | 0.20 |
| 9 | 157 | 203 (55) | 4.21 | 20 | 3,826 | 0.77 |
| 10 | 136 | 109 (19) | 2.16 | 20 | 3,656 | 0.62 |
| 11 | 148 | 203 (25) | 1.83 | 25 | 4,133 | 0.78 |
| 12 | 90 | 33 (12) | 11.57 | 10 | 2,800 | 0.11 |
| 13 | 134 | 70 (20) | 6.73 | 12 | 2,933 | 0.31 |
| 15 | 134 | 63 (6) | 2.24 | 12 | 3,014 | 0.40 |
| 16 | 163 | 71 (17) | 5.27 | 13 | 3,199 | 0.71 |
| 17 | 139 | 233 (102) | 3.71 | 14 | 3,305 | 0.96 |
| 18 | 135 | 89 (19) | 6.36 | 17 | 3,369 | 0.57 |
| 19 | 159 | 221 (72) | 3.01 | 19 | 3,587 | 0.83 |
| 20 | 150 | 73 (25) | 1.91 | 19 | 3,431 | 0.80 |
| 21 | 156 | 112 (14) | 7.52 | 27 | 4,607 | 1.00 |
Abbreviation: SD, standard deviation.
a Villages 6 and 14 were excluded from this analysis because of the poor quality of diarrhea surveillance in these villages.
b Mean number of people captured by active surveillance each week.
c Per 1,000 person-weeks.
d Number of weeks (out of 165) in which the maximum 24-hour rainfall exceeded the 90th percentile value, 56 mm.
e Mean annual rainfall, calculated for three 52-week periods from February 2004 to February 2007.
f A measure of the cost and duration of travel to the nearest city, scaled so that the most remote village had a value of 1.